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Dutch speaker here, that part of the video is the free category, people can try with anything they want there as long as it has wheels, it was a very original idea. There's also the regular, unicycle and group categories earlier in the video.

Also wide wheelbase or not you still have to keep your center of gravity on the above the plank or you'll tip over.

So would this contraption be considered a bicycle because it has two wheels, or still a unicycle since only one wheel is in contact with the ground?

Edit: Just looked up the definitions, a bicycle has two wheels, one behind the other, while according to Wikipedia a unicycle only has one wheel in contact with the ground, but Merriam-Webster says just one wheel total...

Edit 2: I know this seems ridiculous and I'm probably the only one who cares, but in case anyone else sees this and wants closure, digging a little deeper led me to the multi wheeled unicycle. So case closed, I suppose.

I lost an bet with my colleague ( he was doing this every year) many years ago, if he could reach the other side of the river I promised to join him...he did it for the first time in 10 years and I was on national television a year later, it was fun for 2 seconds...

It's extremely difficult, because of something known as counter-steer.

Namely, when you want to turn right to go around the corner, you're going to need to start out by turning left, and/or manipulating your weight, so that you don't just fly off.

So not only do you need to stay on the track, you need to know something about the physics of bicycles (or have really really good instincts) in order to prepare for going around the corner. And then have the skill to actually execute the maneuver.

Or I guess you could just be really good at BMX and do the whole thing on a wheelie.

Counter-steer is non-existent at these speeds. At slow speeds you steer left to go left and right to go right. There's a certain velocity threshold you need to exceed before effective lean angle is required to engage a balanced turn and if you actively counter-steer at these speeds you'll just tip over towards the inside of the turn.

The reason these people are tipping is because they have shitty core-muscle control to move their hips and compensate for the raw pivot balance and the fact that their body mass wants to keep going straight but they need to turn. It's the same problem on a snowboard - or anything where you have a singular "edge" of balance and represent the majority of mass in the system with your body. You have to use your core muscles to manage your body more than people expect.

people intuitively counter-steer, but yeah the trick here is positioning. You want to have that front wheel on the inside edge before a turn, so you can actually start your lean for the turn with the counter steer. People's instinct is to take the widest curve and want to be away from the inner edge, but then when it comes time to turn they just fall off.

Yeah, that might be. It's been too long since I've had any formal physics. Weight on the pedals rather than the seat results in more stability. Not sure what to call that. I remember being taught that it was CoM but maybe that was wrong.

Yes, I actually ride a mountainbike in the woods fairly often, we have a ton of narrow wooden bridges similar to this on the tracks where I ride , and at the speeds they're going, it's not an issue. Their issue is them panicking and freezing because it's narrow and they're scared to run off and in to the water, so they can't steer the bike. Very common in new bikers as well until they learn to trust the bike and their abilities.

Judging by the Muslim headdress on the women I'd guess Malaysia or Indonesia. Neither dry countries but all the same not the kind of place where public drunkenness is encouraged. So I'm leaning toward "high on life"

Sure, they're terrific athletes. They've got the best equipment that money can buy. Hell, every team they're sending over here has their own personal masseuse, not masseur, masseuse. But it doesn't matter. Do you know that every Mohawk competitor has an electrocardiogram, blood and urine tests every 48 hours to see if there's any change in his physical condition? Do you know that they use the most sophisticated training methods from the Soviet Union, East and West Germany, and the newest Olympic power Trinidad-Tobago? But it doesn't matter. It just doesn't matter. IT JUST DOESN'T MATTER. I tell you, IT JUST DOESN'T MATTER! IT JUST DOESN'T MATTER! IT JUST DOESN'T MATTER! And even, and even if we win, if we win, HAH! Even if we win! Even if we play so far over our heads that our noses bleed for a week to ten days. Even if God in Heaven above comes down and points his hand at our side of the field. Even if every man, woman and child held hands together and prayed for us to win, it just wouldn't matter, because all the really good looking girls would still go out with the guys from Mohawk cause they've got all the money! It just doesn't matter if we win or we lose. IT JUST DOESN'T MATTER!